/* eslint-disable vue/no-unused-vars */
<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>用户管理</el-breadcrumb-item>
      <el-breadcrumb-item>用户列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片区域 -->
    <el-card>
      <el-alert title="注意：只允许为第三级分类设置相关参数"
        type="warning"
        show-icon
        :closable="false">
      </el-alert>

      <!-- 选择商品分类区域 -->
      <el-row class="cat_opt">
        <el-col>
          <span>先择商品分类:</span>
          <!-- 选择商品分类的级联选择框 -->

          <el-cascader v-model="selectedCateKeys"
            :options="cateList"
            :props="cateProps"
            @change="handleChange"
            expandTrigger='hover'
            ref="cascaderRef"
            clearable
            @expand-change="cascaderClick"
            @visible-change="cascaderClick"></el-cascader>

          <!-- 渲染分类参数的Tabs标签组件 -->
          <el-tabs v-model="activeName"
            @tab-click="handleTabClick">
            <!-- 添加动态参数的面板 将标签页改为many -->
            <el-tab-pane label="动态参数"
              name="many">
              <!-- 添加参数按钮 -->
              <el-button type="primary"
                size="mini"
                :disabled="isBtnDisabel"
                @click="addDialogVisible = true">动态参数
              </el-button>
              <!-- 动态属性表格 -->
              <el-table :data="manyTabelData"
                border
                stripe>
                <!-- 展开列 -->
                <el-table-column type="expand">
                  <template slot-scope="scope">
                    <!-- 循环生成的el-tag -->
                    <el-tag :key="i"
                      v-for="(item,i) in scope.row.attr_vals"
                      closable
                      :disable-transitions="false"
                      @close="handleClose(i,scope.row)">
                        {{item}}
                    </el-tag>
                    <!-- 输入框 -->
                    <el-input class="input-new-tag"
                      v-if="scope.row.inputVisible"
                      v-model="scope.row.inputValue"
                      ref="saveTagInput"
                      size="small"
                      @keyup.enter.native="handleInputConfirm(scope.row)"
                      @blur="handleInputConfirm(scope.row)">
                    </el-input>
                    <el-button v-else
                      class="button-new-tag"
                      size="small"
                      @click="showInput(scope.row)">+ New Tag</el-button>
                  </template>
                </el-table-column>
                <!-- 索引列-->
                <el-table-column type="index"
                  label="#"></el-table-column>
                <el-table-column label="参数名称"
                  prop="attr_name"></el-table-column>
                <el-table-column label="操作">
                  <!-- 作用域插槽 -->
                  <!-- eslint-disable-next-line vue/no-unused-vars -->
                  <template slot-scope="scope">
                    <el-button size="mini"
                      type="primary"
                      icon="el-icon-edit"
                      @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                    <el-button size="mini"
                      type="danger"
                      icon="el-icon-delete"
                      @click="removeParams(scope.row.attr_id)">删除</el-button>
                  </template>
                </el-table-column>
              </el-table>
            </el-tab-pane>
            <!-- 添加静态属性面板 -->
            <el-tab-pane label="静态属性"
              name="only">
              <!-- 添加属性按钮 -->
              <el-button type="primary"
                :disabled="isBtnDisabel"
                size="mini"
                @click="addDialogVisible = true">静态属性
              </el-button>
              <!--静态属性表格-->
              <el-table :data="onlyTabelData"
                border
                stripe>
                <!--展开列-->
                <el-table-column type="expand">
                  <template slot-scope="scope">
                    <!-- 循环生成的el-tag -->
                    <el-tag :key="i"
                      v-for="(item,i) in scope.row.attr_vals"
                      closable
                      :disable-transitions="false"
                      @close="handleClose(i,scope.row)">
                        {{item}}
                    </el-tag>
                    <!-- 输入框 -->
                    <el-input class="input-new-tag"
                      v-if="scope.row.inputVisible"
                      v-model="scope.row.inputValue"
                      ref="saveTagInput"
                      size="small"
                      @keyup.enter.native="handleInputConfirm(scope.row)"
                      @blur="handleInputConfirm(scope.row)">
                    </el-input>
                    <el-button v-else
                      class="button-new-tag"
                      size="small"
                      @click="showInput(scope.row)">+ New Tag</el-button>
                  </template>
                </el-table-column>
                <el-table-column type="index"
                  label="#"></el-table-column>
                <el-table-column label="属性名称"
                  prop="attr_name"></el-table-column>
                <el-table-column label="操作">
                  <!-- 作用域插槽 -->
                  <!-- eslint-disable-next-line vue/no-unused-vars -->
                  <template slot-scope="scope">
                    <el-button size="mini"
                      type="primary"
                      icon="el-icon-edit"
                      @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                    <el-button size="mini"
                      type="danger"
                      icon="el-icon-delete"
                      @click="removeParams(scope.row.attr_id)">删除</el-button>
                  </template>
                </el-table-column>
              </el-table>
            </el-tab-pane>
          </el-tabs>
        </el-col>
      </el-row>

    </el-card>

    <!-- 添加参数对话框 -->
    <el-dialog :title="'添加'+titleText"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClosed">
      <!-- 添加参数对话框 -->
      <el-form :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px">
        <el-form-item :label="titleText"
          prop="attr_name">
          <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer"
        class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary"
          @click="addParams">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 编辑参数对话框 -->
    <el-dialog :title="'添加'+titleText"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editDialogClosed">
      <!-- 添加参数对话框 -->
      <el-form :model="editForm"
        :rules="editFormRules"
        ref="editFormRef"
        label-width="100px">
        <el-form-item :label="titleText"
          prop="attr_name">
          <el-input v-model="editForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer"
        class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary"
          @click="editParams">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data () {
    return {
      // 商品分类列表数据
      cateList: [],
      // 用户在级联下拉菜单中选中的分类id
      selectedCateKeys: [],
      // 配置级联菜单中数据如何展示
      cateProps: {
        checkStrictly: true, // 允许选择任意一级的选项
        value: 'cat_id', // 指定选项的值为选项对象的某个属性值
        label: 'cat_name', // 指定选项标签为选项对象的某个属性值
        children: 'children' // 指定选项的子选项为选项对象的某个属性值
      },
      // tab页签激活显示的页签项
      activeName: 'many',
      // 动态参数数据
      manyTabelData: [],
      // 静态参数数据
      onlyTabelData: [],
      // 控制对话框
      addDialogVisible: false,
      // 添加参数的表单数据对象
      addForm: {
        attr_name: ''
      },
      // 添加表单的验证规则对象
      addFormRules: {
        attr_name: [
          { required: true, message: '请输入活动名称', trigger: 'blur' }
        ]
      },
      // 控制编辑对话框按钮
      editDialogVisible: false,
      // 编辑参数的表单数据对象
      editForm: {},
      // 添加编辑表单的验证规则对象
      editFormRules: {
        attr_name: [
          { required: true, message: '请输入活动名称', trigger: 'blur' }
        ]
      }

    }
  },
  created () {
    this.getCateList()
  },
  methods: {
    // 获取分类数据列表
    async getCateList () {
      const {
        data: res
      } = await this.$http.get('categories')
      if (res.meta.status !== 200) return this.$message.error('获取商品分类失败！')

      this.cateList = res.data
      // console.log(this.cateList)
    },
    // 当用户在级联菜单中选择内容改变时触发
    handleChange () {
      if (this.selectedCateKeys.length !== 3) {
        this.selectedCateKeys = []
        this.manyTabelData = []
        this.onlyTabelData = []
        // eslint-disable-next-line no-useless-return
        return
      }
      // 证明选中的是三级分类
      console.log(this.selectedCateKeys)
      // 发送请求，根据用户选择的三级分类和面板获取参数数据
      this.getParamsList()
    },
    // 解决bug：点击圆圈后是自动收起下拉；点击文字label同样实现效果
    cascaderClick () {
      const that = this
      setTimeout(function () {
        document.querySelectorAll('.el-cascader-node__label').forEach(el => {
          el.onclick = function () {
            this.previousElementSibling.click()
            that.$refs.cascaderRef.dropDownVisible = false
          }
        })
        document
          .querySelectorAll('.el-cascader-panel .el-radio')
          .forEach(el => {
            el.onclick = function () {
              that.$refs.cascaderRef.dropDownVisible = false
            }
          })
      }, 100)
    },
    // tab页签点击事件的处理函数
    handleTabClick () {
      this.getParamsList()
    },
    // 获取参数的列表数据
    async getParamsList () {
      // 根据所选分类的id 和当前所处的面板，获取对应的参数数据列表
      const {
        data: res
      } = await this.$http.get(
          `categories/${this.cateId}/attributes`, {
            params: {
              sel: this.activeName
            }
          }
      )
      if (res.meta.status !== 200) {
        return this.$message.error('获取参数列表失败')
      }
      console.log(res.data)

      // 循环data中的每一项，把attr_vals参数的字符串，重新赋值为item.attr_vals数组
      res.data.forEach(item => {
        // item.attr_vals = item.attr_vals.split(' ')
        item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []
        // 控制文本框的显示与隐藏
        item.inputVisible = false
        // 文本框中输入的值
        item.inputValue = ''
      })

      // 判断是静态参数还是动态参数
      if (this.activeName === 'many') {
        this.manyTabelData = res.data
      } else {
        this.onlyTabelData = res.data
      }
    },
    // 关闭对话框事件 重置按钮
    addDialogClosed () {
      this.$refs.addFormRef.resetFields()
    },
    // 点击确定添加新参数 先预校验
    addParams () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post(`categories/${this.cateId}/attributes`, {
          attr_name: this.addForm.attr_name,
          attr_sel: this.activeName
          // attr_vals: 'a,b,c'
        })
        if (res.meta.status !== 201) {
          return this.$message.error('获取参数列表数据失败')
        }
        this.$message.success('添加参数成功！')

        this.addDialogVisible = false
        this.getParamsList()
      })
    },
    // 监听 展示编辑参数的对话框
    async showEditDialog (attrId) {
      const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes/${attrId}`, {
        params: { attr_sel: this.activeName }
      })
      if (res.meta.status !== 200) return this.$message.error('查询参数信息失败')
      this.editForm = res.data
      // console.log(this.editForm)
      this.editDialogVisible = true
    },
    // 监听 编辑参数对话框的关闭事件 重置表单内容
    editDialogClosed () {
      this.$refs.editFormRef.resetFields()
    },
    // 点击确认 编辑修改参数
    async editParams () {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        // 可以发起修改参数信息的网络请求
        const { data: res } = await this.$http.put(
          `categories/${this.cateId}/attributes/${this.editForm.attr_id}`,
          { attr_name: this.editForm.attr_name, attr_sel: this.activeName })
        if (res.meta.status !== 200) {
          return this.$message.error('编辑参数信息失败！')
        }
        this.$message.success('编辑参数信息成功！')
        this.getParamsList()
        this.editDialogVisible = false
      })
    },

    // 根据id删除参数对话框
    async removeParams (id) {
      // console.log(id)
      // 弹框 询问用户是否删除
      const confirmResult = await this.$confirm('此操作将永久删除该参数, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)

      // 如果用户确认删除，则返回值为字符串 confirm
      // 如果用户取消删除，则返回值为字符串 cancel
      // console.log(confirmResult)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      // console.log('确认删除')
      // 发起删除参数的网络请求
      // eslint-disable-next-line no-undef
      const { data: res } = await this.$http.delete(`categories/${this.cateId}/attributes/${id}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除参数信息失败！')
      }
      this.$message.success('删除参数信息成功！')
      this.getParamsList()
    },
    // 文本框失去焦点或按下回车键时都会触发
    async handleInputConfirm (row) {
      // console.log('ok')
      console.log(row)
      if (row.inputValue.trim().length === 0) {
        row.inputValue = ''
        row.inputVisible = false
        // eslint-disable-next-line no-useless-return
        return
      }

      // 如果没有return，则证明输入的内容，需要做后续处理
      row.attr_vals.push(row.inputValue.trim())
      row.inputValue = ''
      row.inputVisible = false
      // 发起请求保存操作
      this.saveAttrVals(row)
    },
    // 将对attr_vals 的操作保存到数据库
    async saveAttrVals (row) {
      const { data: res } = await this.$http.put(
        `categories/${this.cateId}/attributes/${row.attr_id}`,
        { attr_name: row.attr_name, attr_sel: row.attr_sel, attr_vals: row.attr_vals.join(' ') }
      )
      console.log(res)
      if (res.meta.status !== 200) {
        return this.$message.error('添加修改参数项失败！')
      }
      this.$message.success('添加修改参数项成功！')
    },
    // 点击按钮展示文本输入框
    showInput (row) {
      row.inputVisible = true
      // 让文本框自动获得焦点
      // $nextTick 方法的作用：就是当页面上元素被重新渲染之后，才会执行回调中的代码
      this.$nextTick(_ => {
        this.$refs.saveTagInput.$refs.input.focus()
      })
    },
    // 根据索引删除对应参数的可选项
    handleClose (i, row) {
      row.attr_vals.splice(i, 1)
      // 发起请求保存操作
      this.saveAttrVals(row)
    }
  },
  computed: {
    isBtnDisabel () {
      if (this.selectedCateKeys.length !== 3) {
        return true
      }
      return false
    },
    // 获取选中的三级分类id
    cateId () {
      if (this.selectedCateKeys.length === 3) {
        return this.selectedCateKeys[this.selectedCateKeys.length - 1]
      }
      return null
    },
    titleText () {
      if (this.activeName === 'many') {
        return '动态参数'
      }
      return '静态参数'
    }
  }
}

</script>

<style lang="less" scoped>
  .cat_opt {
    margin-top: 15px;
  }
.input-new-tag{
  width: 120px;
}
</style>
